He is credited with piano and vocals on the album.
He is further credited on the album with musical direction.
Nelson asked not to be credited on the final album.
He is also credited on the album as assistant producer.
Plant is credited on the album with "occasional bass".
Instead most of his songs were sung by a backup singer, who is credited on the album.
Brown played piano and mellotron during these sessions but is not credited on the album either as a writer or player.
The recording sessions changed radically in the last few months, which is why Hooper was not credited on the album.
However, the two musicians failed to maintain a working relationship, and ultimately Nelson chose not to be credited for his production role on the album.
Eyre played on some of the tracks but is not credited on the album.